lock_file: better message if too many open files

Recommend using `ulimit -n` to increase maximum number of open files.
Homebrew · Mar 7, 2023 · 116fd59 · 116fd59
1 parent 5cac33c
commit 116fd59
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/Library/Homebrew/lock_file.rb b/Library/Homebrew/lock_file.rb
@@ -42,7 +42,11 @@ def with_lock
   def create_lockfile
     return if @lockfile.present? && !@lockfile.closed?
 
-    @lockfile = @path.open(File::RDWR | File::CREAT)
+    begin
+      @lockfile = @path.open(File::RDWR | File::CREAT)
+    rescue Errno::EMFILE
+      odie "The maximum number of open files on this system has been reached. Use `ulimit -n` to increase this limit."
+    end
     @lockfile.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
   end
 end